supported letters and symbols are...
abcdefghij
klmnopqrst
uvwxyz.?!/
0123456789
ABCDEFGHIJ
KLMNOPQRST
UVWXYZ(){}
[]<>#$%&*+
abcdefghij
klmnopqrst
uvwxyz.?!/
0123456789
ABCDEFGHIJ
KLMNOPQRST
UVWXYZ(){}
[]<>#$%&*+